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Acadia National Park Managers’ Report
A citizen science early-detection summary
Welcome to the weekly early detection report of observations submitted by iNaturalist and eBird users. These are all observations submitted over the past week for species that Acadia National Park managers and partners have identified as being of conservation interest. These data for this report comes from two of the largest open source citizen science projects: iNaturalist and eBird. The records included in this report include both casual and research grade observations, so erroneous identifications are possible. Users should double check the identification of species to ensure they are correct.
12 January 2026 - 18 January 2026

Explore Species Locations

Invasive Species

A Hemlock tree infested with Hemlock Woolly Adelgid
© Jesse Wheeler

There were no invasive species reported this week.

Threatened & Endangered Species

Two Red Knots in flight
© Fyn Kynd
Scientific Name Common Name Listing Date Observed Link
Histrionicus histrionicus harlequin duck state threatened 2026-01-17 view observation

Rare Species

A flowering Nodding Trillium
© Andy Fyon
Scientific Name Common Name Date Observed Link
Fraxinus ashes 2026-01-16 view observation
Andropogon gerardi big bluestem 2026-01-17 view observation
Sorghastrum nutans indiangrass 2026-01-17 view observation
Toxicodendron rydbergii western poison ivy 2026-01-16 view observation
Toxicodendron rydbergii western poison ivy 2026-01-16 view observation

Buffer Zone Species (10-mile buffer)

© Kyle Lima

There were no species reported from the buffer zone this week.

New Park Species

A something
© Kyle Lima

There were no new species to the park reported this week.

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